A hybrid slot multimode resonant broadband patch antenna structure for UWB audio transmission and positioning

Abstract

This invention discloses a hybrid slot multimode resonant broadband patch antenna structure for UWB audio transmission and positioning. The structure includes a PCB substrate, a rectangular patch antenna, and a rectangular metal ground plane. The rectangular patch antenna has a U-shaped slot, with a left slot and a right slot on either side of the U-shaped slot. These slots form an E-shaped structure on the antenna, which, together with the U-shaped slot, creates a hybrid slot multimode resonant broadband patch antenna structure. This invention combines a U-shaped slot and an E-shaped structure on the rectangular patch antenna, enabling three resonant modes and achieving multimode broadband radiation, easily covering the CH9 channel in UWB applications. Multimode resonance is achieved through a simple hybrid slot design, simplifying structural design and manufacturing complexity. Simultaneously, multimode broadband radiation improves data transmission and anti-interference capabilities, ensuring high data throughput and positioning accuracy.

Description

Technical Field

[0001] This utility model relates to the field of wireless communication technology, and in particular to a hybrid slot multimode resonant broadband patch antenna structure for UWB audio transmission and positioning. Background Technology

[0002] Traditionally, audio transmission is primarily achieved using Bluetooth and Wi-Fi technologies, while positioning technology mainly relies on traditional infrared, RFID, Bluetooth, and Wi-Fi. Compared to traditional wireless communication technologies, UWB (Ultra-Wideband) boasts high data transmission rates and precise positioning capabilities. Due to its use of higher frequency bands and wider bandwidth, UWB effectively reduces interference, ensuring stable audio transmission and providing headphones with higher quality lossless, high-resolution audio, becoming a key factor in improving the audio transmission quality of wireless audio products. Besides its superior audio playback capabilities, UWB also offers excellent positioning accuracy, providing centimeter-level precision, making it easy for users to find objects and solving everyday problems. However, current UWB antenna units used for audio transmission and positioning suffer from narrow bandwidth, making it difficult to guarantee stable, interference-free wireless transmission, high-speed data transmission, and accurate positioning. Currently, patch antenna units used in UWB applications either have very narrow bandwidths, with only two resonant modes, or their structures are too complex for large-scale manufacturing and application. Utility Model Content

[0003] This invention addresses the shortcomings of existing technologies by providing a hybrid slot multimode resonant broadband patch antenna structure for UWB audio transmission and positioning. This structure is simple in structure, more rationally designed, has a wider bandwidth, improves data transmission and anti-interference capabilities, and can be mass-produced and applied.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a hybrid slot multimode resonant broadband patch antenna structure for realizing UWB audio transmission and positioning, comprising a PCB substrate, a rectangular patch antenna disposed on the top of the PCB substrate, and a rectangular metal ground plane disposed on the bottom of the PCB substrate, wherein the rectangular patch antenna is connected to the rectangular metal ground plane; a U-shaped slot is provided in the middle region of the rectangular patch antenna, and a left slot and a right slot are respectively provided on the left and right sides of the U-shaped slot on the rectangular patch antenna, forming an E-shaped structure on the rectangular patch antenna through the left and right slots, and the E-shaped structure combined with the U-shaped slot to form a hybrid slot multimode resonant broadband patch antenna structure.

[0005] Furthermore, the feed point of the hybrid slot multimode resonant broadband patch antenna structure is located on the straight line of the symmetry center of the antenna geometry.

[0006] Furthermore, the U-shaped groove forms a symmetrical structure about the feed point.

[0007] Furthermore, the E-shaped structure formed by the left and right slots on the rectangular patch antenna constitutes a symmetrical structure about the feed point.

[0008] Furthermore, the U-shaped slot is located at the center of the rectangular patch antenna.

[0009] Furthermore, the left and right slots are respectively located near the two edges of the rectangular patch antenna.

[0010] Furthermore, the rectangular patch antenna is connected to the rectangular metal ground plane using a coaxial cable. The outer conductor of the coaxial cable is soldered to the rectangular metal ground plane, and the inner conductor is soldered to the rectangular patch antenna.

[0011] Preferably, the rectangular metal floor is the same size as the PCB substrate.

[0012] This invention creates a hybrid slot patch antenna structure by incorporating a U-shaped slot on a rectangular patch antenna and adding two slots on either side of the U-shaped slot to form an E-shaped structure. This hybrid U-shaped and E-shaped slot patch antenna structure achieves multimode resonance and broadband radiation by utilizing the U-shaped slot and E-shaped structure, which are symmetrical about the feed point. This eliminates the need for any additional structural elements such as metal short-circuit posts. It not only broadens the antenna bandwidth and improves data transmission performance and anti-interference capabilities but also simplifies the structure, facilitating large-scale manufacturing and application. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a structural schematic diagram of the present invention from another angle;

[0015] Figure 3 This is a return loss curve of the antenna element of this utility model;

[0016] Figure 4 This is a diagram showing the actual gain of the antenna of this invention at 7-9 GHz;

[0017] Figure 5 This is the XZ-plane radiation pattern of the antenna of this invention at 7.7 GHz;

[0018] Figure 6 This is the YZ-plane radiation pattern of the antenna of this invention at 7.7 GHz;

[0019] Figure 7 This is the XZ-plane radiation pattern of the antenna of this invention at 8 GHz;

[0020] Figure 8This is the YZ-plane radiation pattern of the antenna of this invention at 8 GHz;

[0021] Figure 9 The XZ-plane radiation pattern of the antenna of this invention at 8.3 GHz;

[0022] Figure 10 This is the radiation pattern of any antenna of this invention on the YZ-plane at 8.3 GHz.

[0023] In the diagram, 1 is the PCB substrate, 2 is the rectangular metal ground plane, 3 is the rectangular patch antenna, 4 is the U-shaped slot, 51 is the left slot, 52 is the right slot, and 6 is the coaxial cable. Detailed Implementation

[0024] In this embodiment, refer to Figure 1 and Figure 2 The hybrid slot multimode resonant broadband patch antenna structure for UWB audio transmission and positioning includes a PCB substrate 1, a rectangular patch antenna 3 disposed on top of the PCB substrate 1, and a rectangular metal ground plane 2 disposed at the bottom of the PCB substrate 1. The rectangular metal ground plane 2 has the same dimensions as the PCB substrate 1. The PCB substrate 1 has a dielectric constant of 4.05, a loss tangent of 0.0068, and a thickness of 1.524 mm. The rectangular patch antenna 3 is connected to the rectangular metal ground plane 2. A U-shaped slot 4 is provided in the middle region of the rectangular patch antenna 3. A left slot 51 and a right slot 52 are respectively provided on the left and right sides of the U-shaped slot 4 on the rectangular patch antenna 3. The left slot 51 and the right slot 52 form an E-shaped structure on the rectangular patch antenna 3. The E-shaped structure, together with the U-shaped slot 4, forms a hybrid slot multimode resonant broadband patch antenna structure. The rectangular patch antenna 3 can be 8mm*11mm in size. Multimode broadband characteristics are achieved through a 3mm*4.8mm U-shaped slot 4 and left and right slots 51 and 52, each 5mm in length. The bandwidth percentage is 14.5% (7.34-8.49GHz), enabling three resonant modes and achieving multimode broadband radiation. This easily covers the ch9 channel (7.7-8.3GHz) in UWB applications, ensuring high-speed audio data transmission and high-precision positioning with anti-interference capabilities within the operating frequency band. This simple method of creating mixed slots to achieve multimode resonance simplifies the complexity of structural design and manufacturing.

[0025] The feed point of this hybrid slot multimode resonant broadband patch antenna structure is located on the straight line of symmetry of the antenna geometry. The U-shaped slot 4 is located at the center of the rectangular patch antenna 3 and forms a symmetrical structure about the feed point. The E-shaped structure formed by the left slot 51 and the right slot 52 also forms a symmetrical structure about the feed point, with the left slot 51 and right slot 52 positioned near the edges of the rectangular patch antenna 3, but not touching the edges. The symmetrical structure about the feed point achieved by the U-shaped slot 4 and the E-shaped structure ensures that the antenna radiation pattern is free from angular distortion.

[0026] The rectangular patch antenna 3 is connected to the rectangular metal ground plane 2 by a coaxial cable 6. The outer conductor of the coaxial cable 6 is soldered to the rectangular metal ground plane 2, and the inner conductor is soldered to the rectangular patch antenna 3.

[0027] like Figure 3 As shown, in the S11 parameter response of the antenna, it can be seen that the multimode resonant broadband antenna element has three resonant points, which are 7.41GHz, 7.77GHz and 8.29GHz respectively. The multimode broadband frequency band is 7.34-8.49GHz, and the bandwidth percentage is 14.5%.

[0028] like Figure 4 As shown in the figure, the curve represents the actual gain. From the actual gain response of the multimode broadband antenna element, it can be seen that the patch antenna has an actual gain greater than 5dBi within the 7.7-8.3GHz range. Practical verification shows that this antenna element can smoothly achieve high-precision angle and distance measurement and audio transmission functions within 150m.

[0029] like Figure 5 The image shows the radiation pattern of this antenna element on the xz-plane (phi=0) at 7.7 GHz. The upper curve represents the main polarization pattern, and the lower curve represents the cross-polarization pattern.

[0030] Figure 6 The image shows the radiation pattern of this antenna element on the yz-plane (phi=90) at 7.7 GHz. The upper curve represents the main polarization pattern, and the lower curve represents the cross-polarization pattern.

[0031] Figure 7 The image shows the radiation pattern of this antenna element on the xz-plane (phi=0) at 8 GHz. The upper curve represents the main polarization pattern, and the lower curve represents the cross-polarization pattern.

[0032] Figure 8 The image shows the radiation pattern of this antenna element on the yz-plane (phi=90) at 8 GHz. The upper curve represents the main polarization pattern, and the lower curve represents the cross-polarization pattern.

[0033] Figure 9 The image shows the radiation pattern of this antenna element on the xz-plane (phi=0) at 8.3 GHz. The upper curve represents the main polarization pattern, and the lower curve represents the cross-polarization pattern.

[0034] Figure 10 The image shows the radiation pattern of this antenna element on the yz-plane (phi=90) at 8.3 GHz. The curve above represents the main polarization pattern, and the curve below represents the cross-polarization pattern.

[0035] Depend on Figures 5-10 It can be seen that within the 7.7-8.3GHz range and within a viewing angle of ±180 degrees, the main polarization component of this antenna element is about 25dB greater than the cross-polarization component, i.e., the cross-polarization ratio is >25dB. This ensures the directivity and accuracy of the antenna's angle resolution.

[0036] Typically, in engineering applications, the |S11| of the antenna port is required to be less than -10dB, and the cross-polarization ratio is required to be greater than 12dB. This is the normal standard, meaning that the multimode broadband antenna element in this invention can be used to distinguish angles and distances, while also ensuring a large throughput during data transmission, thus realizing the functions of UWB audio transmission and positioning.

[0037] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made in accordance with the scope of this application should still fall within the scope of the present invention.

Claims

1. A hybrid slot multimode resonant broadband patch antenna structure for UWB audio transmission and positioning, comprising a PCB substrate, a rectangular patch antenna disposed on the top of the PCB substrate, and a rectangular metal ground plane disposed on the bottom of the PCB substrate, wherein the rectangular patch antenna is connected to the rectangular metal ground plane, characterized in that: A U-shaped slot is provided in the middle area of ​​the rectangular patch antenna. A left slot and a right slot are provided on the left and right sides of the U-shaped slot on the rectangular patch antenna, respectively. The left and right slots form an E-shaped structure on the rectangular patch antenna. The E-shaped structure and the U-shaped slot together form a hybrid slot multimode resonant broadband patch antenna structure.

2. The hybrid slot multi-mode resonant wideband patch antenna structure implementing UWB audio transmission and positioning according to claim 1, characterized in that: The feed point of the hybrid slot multimode resonant broadband patch antenna structure is located on the straight line of the symmetry center of the antenna geometry.

3. The hybrid slot multimode resonant broadband patch antenna structure for realizing UWB audio transmission and positioning according to claim 2, characterized in that: The U-shaped groove forms a symmetrical structure about the feed point.

4. The hybrid slot multimode resonant broadband patch antenna structure for realizing UWB audio transmission and positioning according to claim 2, characterized in that: The E-shaped structure formed by the left and right slots on the rectangular patch antenna is symmetrical about the feed point.

5. The hybrid slot multimode resonant broadband patch antenna structure for realizing UWB audio transmission and positioning according to claim 1, characterized in that: The U-shaped slot is located at the center of the rectangular patch antenna.

6. The hybrid slot multimode resonant broadband patch antenna structure for realizing UWB audio transmission and positioning according to claim 1, characterized in that: The left and right slots are respectively located near the two edges of the rectangular patch antenna.

7. The hybrid slot multimode resonant broadband patch antenna structure for realizing UWB audio transmission and positioning according to claim 1, characterized in that: The rectangular patch antenna is connected to the rectangular metal ground plane using a coaxial cable. The outer conductor of the coaxial cable is soldered to the rectangular metal ground plane, and the inner conductor is soldered to the rectangular patch antenna.

8. The hybrid slot multimode resonant broadband patch antenna structure for realizing UWB audio transmission and positioning according to claim 1, characterized in that: The rectangular metal floor is the same size as the PCB substrate.

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